You can play chess or bughouse double chess game using DoubleChessBoard with friends thru internet or local network. Its simple : You have to start this software 1x as server (Menu: NetGame / Start Server) and then several times as clients (Menu: NetGame / Join to Server). The port on which You will hosts the server You can select any You wish, for example 1000. If You wish play bughouse on local network in home for example, and You have not still configured local network, here is advice: You can configure IP on computers in interval 192.168.0.0 to 192.168.0.255 and set the mask on all computers as 255.255.255.0 . If You have only single computer You can run all on this computer and as IP You can type 127.0.0.1 what is synonym for localhost.